#include <bits/stdc++.h>
using namespace std;
int n;
int a[50];
int res[50], cnt[50];
void check(int i = 1, int used = 0, int inv = 0, int total = 0) {
if(i == n + 1) {
int c = total;
if(res[c] == inv)
cnt[c]++;
else if(res[c] > inv) {
res[c] = inv;
cnt[c] = 1;
}
return ;
}
check(i + 1, used, inv, total);
used ^= (1 << a[i]);
int minv = inv;
inv += total - __builtin_popcount(used & ((1 << a[i]) - 1));
total++;
check(i + 1, used, inv, total);
used ^= (1 << a[i]);
inv = minv;
total--;
}
int main() {
scanf("%d", &n);
for(int i = 1 ; i <= n ; i++) {
scanf("%d", &a[i]);
a[i]--;
res[i] = 1e8;
}
check();
for(int k = 1 ; k <= n ; k++)
printf("%d %d\n", res[k], cnt[k]);
return 0;
}
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 | #include <bits/stdc++.h> using namespace std; int n; int a[50]; int res[50], cnt[50]; void check(int i = 1, int used = 0, int inv = 0, int total = 0) { if(i == n + 1) { int c = total; if(res[c] == inv) cnt[c]++; else if(res[c] > inv) { res[c] = inv; cnt[c] = 1; } return ; } check(i + 1, used, inv, total); used ^= (1 << a[i]); int minv = inv; inv += total - __builtin_popcount(used & ((1 << a[i]) - 1)); total++; check(i + 1, used, inv, total); used ^= (1 << a[i]); inv = minv; total--; } int main() { scanf("%d", &n); for(int i = 1 ; i <= n ; i++) { scanf("%d", &a[i]); a[i]--; res[i] = 1e8; } check(); for(int k = 1 ; k <= n ; k++) printf("%d %d\n", res[k], cnt[k]); return 0; } |
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